soli TOC cube

The versatile instrument for temperature-dependent differentiation of carbon in solids

The determination of TOC in solids has recently become ever more important. Not just for evaluating wastes, TOC-content measurement is also an important aspect of assessing soils.The new soli TOC cube offers users the option of measuring not only total organic and total inorganic carbon, but also determining the residual oxidizable carbon (ROC). In addition to the classical TOC determination by direct and subtraction acidification methods, temperature programming can also be employed, which requires neither sample preparation nor the use of acids.

Unmatched analytical performanceIn temperature programming, a precise, adjustable temperature is required for reproducible measurements. Thus in the soli TOC cube, the temperature is measured where it matters, directly at the crucible. This eliminates all possible thermal interferences. Additionally, the use of a post-combustion catalyst ensures that even high carbon-content samples are quantitatively oxidized and achieve equally high measurement quality.

Simplified sample preparationWith the soli TOC cube, larger samples on the order of grams can be reliably analyzed: just weigh the solid samples in the reusable crucibles, place them on the autosampler, and start the sequence. This makes the soli TOC cube the perfect instrument for the precise analysis of inhomogeneous samples. Measurement of TOC according to DIN 15936 is also remarkably simple. The sample is acidified directly in the ceramic crucible and after drying delivered immediately to the instrument – simple, fast, and reliable.

Reliable analysisThe software allows for implementing predefined methods in addition to custom programming of the heating rate and hold times. Peak integration is executed automatically and can be manually checked. This ensures that even the most difficult analyses can produce precise measurement of each individual component.

Unsurpassed flexibilityThe soli TOC cube is capable of distinguishing between the different forms of carbon by either temperature programming or a combined temperature program with gas switching. In a single program, the TOC, ROC, and TIC can all be determined. Alternatively, the classical method of acidification, drying, and TOC measurement at constant temperature is also possible.

Application Notes

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Measuring method:True temperature ramping in an oxygenated atmosphere up to 900 °C for TOC, ROC and TIC determination in solids compliant with DIN 19539. Alternative gas switching for combination of oxidizing and non-oxidizing carrier gases in one course to separate ROC and TIC. Isothermal catalytic combustion for the determination of TOC in solids compliant with EN 15936. Option for simultaneous TN determination with ECD.

Large concentration rangeFrom a few ppm up to 100 % or 50 mg carbon and 20 mg (0 – 15 %) nitrogen absolute.

Easy sample preparation and handling:Without any special sample preparation, all kinds of solid samples are weighed into steel or ceramic sample crucibles (sample mass up to 3 g).

Fully automatic:Automated and unattended operation is possible by the integrated 89 autosampler and PC-control through Windows®. Furthermore, optional 21 CFR Part 11 compliant software is available.

Attachment for TIC-determination in solids soliTIC:Attachment for safe acid digestion of ground solids. Release of the carbonate carbon (TIC) as CO2 for the measurement with the detector of the attached TOC analyzer. Comfortable sample change on permanently installed reactor.

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